Carbureter.



l. W. DILLON` CARBURETER.

APPLICATION FILED DEC.14. |915. 1,209,405.A Patented De@.19,1916.

. 2 SHEETS-SHEET l.

i. W. DILLON.

CARBURETER.

APPLICATION FILED Dec. I4. I9I5.

l ,209,405 Patented Dec. 19, 1916.

2 SHEETS-SHEET 2.

Fig-1 IRVING W. DILLON, 0F LAWRENCE, MASSACHUSETTS.

CARBURETER.

Specification of Letters Patent.

Patented Dec. 19, 1916..

Application led December 14,. 1915.V Serial No. 66,804.

vention, such as will enable others skilled in the art to which it appertains to use the same.

This invention relates to carbureters of that type especially designed for use in connection with internal combustion engines, and has for its primary object to provide make and j, an improvedand simplified carbureter. embodying means whereby the relativeproportion of gasolene and air may be varied so as to insure maximum Aworking efficiency of various types of internal combustion engines.

Another object is the' provision of means controlled by the throttle lever for admitting an auxiliary supply of air to the intake pipe of the engine when the latter is running at high speed or the throttle is opened to a predetermined point.

- Another object is the provision of a carbureter embodying a mixing chamber having a plurality of air inlet ports formed in the wall thereof at a point adjacent the needle valve, thereby insuring a more thorough carburetion of the liquid fuel.

With these and other objects in view the invention consists in the novel construction, arrangement and formation of parts as will be hereinafter specifically described,claimed reter, partly in side elevation.

; view through the needle valve stem. Fig. 5

represents a detail sectional view through the adjusting track for the needle valve.

Referring to the drawing in detail, wherein similar reference numerals designate corresponding parts throughout the several views, the numeral 8 indicates the body of the carbureter, which is preferably of substantially cylindrical formation and provided at one end with a head 9 adapted for connection with the intake pipe of an internal combustion engine (not shown)- The end of the body 8 opposite the head or cou-Y pling 9 is formed with an air intake port 10 and the interior 11 of said body constitutes the mixing chamber of the carbureter. The central portion Vof the body 8 is formed with a plurality of spaced and relatively small free air intake ports 8a. An air valve 10b is arranged in the intake port 10 and is normally retained closed'by the tension of a spring 10, the tension of which may be varied as desired by an adjusting screw 10d.

The bottomof the body S is formed with a depending hollow extension 12 formed at its opposite sides with fuel ports 12b. A horizontally disposed fuel pipe 12e is formed at one end with an annular member 12c rotatably mounted upon the hollow extension 12 and adapted to be secured in adjusted position by a flanged plug or cap 12d. The horizontally disposed fuel pipe 12e may be adjusted so as to project laterally of either side of the carbureter body 8 and thus permit the float chamber 13 to be arranged on either side of the carbureter body, as desired. In either adjusted position the bore of the horizontal fuel pipe 12e registers with one or the other of the fuel ports 12b in the depending extension 12 and the opposite end of the bore of said fuel pipe communicates by a passage 12a with a oat chamber 18, in which is arranged a float 16, having a laterally projecting arm 17 pivotally secured at 18 in the valvehousing 18a formed integral with theI wallof the chamber 13. The upper open ond of the 'float chamber 13 is preferably closed by a removable top plate 14, which latter is normally retained in closed position by the tension of a pivoted leaf spring 15, andthe outer free end of the float carried arm 17 is connected with a needle valve 19 adapted to control the flow of liquid fuel through the fuel inlet port 2O formed in the bottom of the valve casing 18 and adapted to be connected with a fuel pipe (not shown).

. The lower central portion of the carbu` reter body S is formed with a port in which is secured a sprayer nozzle 21, having the upper end of the bore thereof flared and adapted to cooperate with the pointed end of a needle valve 22 slidably mounted in an aperture 2-1 formed in the upper portion of the body 8 and having a head or handle 25 at its upper exposed end. The upper exposed portion of the stem of the valve 22 is formed with external screw threads upon which is fitted a nut 26, having diametrically opposed mounted. in a pair of uprights 30 formed integral with the upper portion ofthe carbui-eter body S. A U-sha'ped guide 31 is secured at its free ends to the upper portion of the body 8 upon opposite sides of the stem of the needle valve 22 and is formed in its web portion with an aperture receiving the upper extremity ofthe valve for guiding the vertical movement thereof. An expansion spring 32 is coiled about the stem ofthe needle valve yand is engaged between the web portion of the Ushaperd guide 31 and the nut 26, for normally retaining the needlevalve in downwardly extended position.

lThe freey end of the supporting arm 2S is formed with a socket 34mV which is rotatably mountedV a bearing ball 35 engaged with acurved flexible track or strip 36 ad justably secured at its opposite` l ends by screws or equivalent means 37 to a segmental plate 38 rigidly secured to or formed-integralwith the throttle armr 39, which latter is nonrotatably secured to a stem or sha ft fil-0 rotatably mounted in diametrically op` posed'apertures'formed in the body S' and carrying the lthrottle"valve 42 adapted to control the passage of gaseous fuel `through the bodyS. 1

The central portion of the flexible track or.

strip 36 is supported upon sorefvsl threaded into apertures formed in the plate 3S and provided with heads" whereby they may be: conveniently adjusted to raise or lower the,

track. The track'iis secured to the4 headed small screws'fle.

ends ofthe adjusting screws lf3 byrelativ'ely receiving "an adjusting screwA 'H51 y engagedv with the upper surface of the relatively short Y arm `of f a` bell crank 52, which latter isdpivotalljT securedtotafpin 53 projecting laterally of thebody 8 inwardly of the'afper# tulres/l-(jTr l-r springt?)LL is engaged. between the other arm y50y 4andfthe` relatively short arm `ofthe bell crank-52 and normally rei tains the latter in engagenient with Y the adjusting ,screw 51. The llongfarm4 of the bell crank 52is formedin its freegenidV with a socketfl receiving the Aspherical end ofan adjustable link 55, which latteris secured at itsA opposite end to a lateral projection 56 of thesegmental p late.l

Iniise, -the quantity of liquid fuel enteringrtlliei mixing chamber 11 through the noz- 21 is properly regulated by adjusting` the needlevalve 22 in the nut 26 and when thc throttle is opened the pivoted arm 2S is lifted upon the inclined track or strip 3G, thus simultaneously opening the needle valve 22. The extent of movement of the needle valve 22'funder the influence of the track or stripflG vmaybe varied, as desired, by ad justingthe screws 1land'thereby varying the inclination of the track 36V. During the opening movement ofthe throttle valve 42.

rotary'motion is imparted to the sleeve 47 through `the link 55 andbellrcrank 52, and thus when the throttle valve has been opened to a predetermined point the ports 48 in the sleeve are moved into registration with the ports VLlG-iifi the carbure-ter body 8, thus admitting an auxiliary supply of free air to rali'tyof auxiliary airports formed therein, ra vsleeve rotatably mounted upon said bodyhavinga plurality of air ports therein adapted `'to be moved into. registration with the first-'mentioned air ports, a pair of .spaced laterally 'projecting arms, carried by said sleeve, a bell crank pivot'ally secured Vto said.

body having oneoffthearm's thereof: engaged ,between the irstmentioned arms, an adjustable stop carriedby one of the firstmen'tionedarns engaged by the arm of said bell crank, meansnormally retaining the arm of said bell-,c'rankfin engagement-with theisaid adjustable stop, a throttle valven rotatably mounted in said body, and-a conncction between said throttle valve Vand -said bell crank.

'2l`1n'a carbureter, a. body having an in-` ternal mixing chamber and a plurali-tyA of airportsr formed therein, 'a'nozzle arranged within saidvb'o'dy yailjacentsaid air intake ports,y a needle valve associated" with said nozale, a nutfadjustably fitted f upon said valve and h'avinga 1'pair of diametrically opposed 'grooves therein, an arm pivotally secured to said bodywand having one Vend bifiircated'and ,engaged 4inl the grooves in said nut, ath'rottle'val've rotatably" mounted in saidbo/dy," afsegmental'plate carried lby 'throttle fvalve, 'aflexible track secured tothe surface of said segmental plate, means for adjusting said 'strip, said-strip constitutingualii adjustable'supp'ort forthe free end ofs'aidarm, saidjbody having fa plurality of auxiliaryairports therein', Ya rotatable sleeve engaged' with saidv body having` a' plurality of"'apertiues1 therein `adaptedto be' moved 130 into registration with said auxiliary air ports, and means connecting said throttle Valve With said sleeve.

3. In a carbureter, a body having an internal mixing chamber and a plurality of auxiliary air ports formed therein, a nozzle arranged in said body, a needle valve associated With said nozzle, an arm pivotally secured to said body andengaged with said needle valve, a sleeve rotatably mounted upon said body having a plurality of air ports therein adapted to be moved into registration With the first mentioned air ports, a pair of spaced laterally projecting arms carried by said sleeve, a bell crank pivotally secured to said body having one of the arms thereof engaged between the first-mentioned arms, an adjustable stop carried by one of the first-mentioned arms engaged by the arm of the bell crank, means normally retaining the arm of said bell crank in engagement with said adjustable stop, a throttle Valve rotatably mounted in said body, a connection between said throttle valve and said bell crank, and adjustable means carried by said connection and engaged with said arm for adjusting said needle valve simultaneously with said throttle valve.

In testimony whereof I aflix my signature in presence of two Witnesses.

IRVING lV. DILLON. Witnesses:

WAL'IER CoULsoN, HELEN A. SMITH.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

